Abdomen exercise device



FIG. 1 is a perspective view of a abdomen exercise device showing my new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a right side elevation view thereof;

FIG. 4 is a left side elevation view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is a rear elevation view thereof; and,

FIG. 8 is a bottom plan view thereof, in an extended position. 

The ornamental design for an abdomen exercise device, as shown and described. 